How do I get a colored object to glow on white?
Switch the render engine to Cycles and Emission will cast light onto other objects as expected.

In Eevee, shift+A Add 'Light Probe' &gt;'Irradiance Volume'

Scale it up so the inner bounding box surrounds the scene.
In Render Settings under 'Indirect Lighting' you'll have to 'Bake Indirect Lighting'

In this image I've already baked it so you can see the result. Hope that's what you're looking for.